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Showing 1,541 Results. Searched 200,756 documents.
Abstract: A Field Experiment Recording Low Seismic Frequencies; #90174 (2014)
G. F. Margrave, M. B. Bertram, K. L. Bertram, K. W. Hall, K. A. H. Innanen, D. C. Lawton, L. E. Mewhort, and T. M. Phillips
Search and Discovery.com
... without any reduction in power at the low end. Figure 3: a) The Fourier amplitude for four sources as recorded by Vectorseis accelerometers...
2014
Abstract: Kirchhoff Imaging with Adaptive Greens Functions for Compensation for Dispersion, Attenuation, and Velocity Imprecision; #90187 (2014)
Andrew V. Barrett
Search and Discovery.com
... spectrum. This is accomplished by taking the Fourier transform of Wsrx, scaling each complex Fourier component by the inverse of its complex amplitude...
2014
Abstract: Can Interpolation Help Reduce Acquisition Costs? A Case Study; #90187 (2014)
Ye Zheng, Balazs Nemeth, Christian Escalante, Andrea Crook, Keith Millis, and Laurie Ross
Search and Discovery.com
...). The interpolation method used for the tests is the Anti-Leakage Fourier Transform (ALFT) (Xu et al, 2004), which works in 5D frequency-wavenumber domain...
2014
Abstract: Interpolation by Angular Deconvolved prior MWNI (AdMWNI); #90224 (2015)
Mark Ng and Dan Negut
Search and Discovery.com
... weight function. Theory and Method Define d(x,t) to be the observed input with missing data, and D(kx,ω) its corresponding Fourier transform. Find...
2015
Innovations in Borehole Microresistivity Image Data Analysis, #41488 (2014).
Peter A. Elkington, Said Assous, James A. Whetton, David Hu
Search and Discovery.com
... Component Analysis (MCA) MCA – Conceptual Overview (1 of 2) A 1 1 0.9 Fourier Transform 0 Analysis -0.5 -1 0.8 0.7 Magnitude 0.5 B 0.6 0.5...
2014
Empirical Mode Decomposition (EMD) of Turner Valley Airborne Gravity Data in the Foothills of Alberta, Canada; #41581 (2015)
Hassan Hassan
Search and Discovery.com
.... The Fourier transform (FFT) is designed to work with linear and stationary signals. The wavelet transform, on the other hand, is well-suited to handle...
2015
Identification of Fracture Zone in Field A Using Maximum Entropy Method
Aditya T. Pratama, Leonard J.I. Lisapaly
Indonesian Petroleum Association
... such as Fourier transform or Wigner distribution can be used. In this work, however, the MEM was used to analyze the seismic spectra. The MEM has narrower...
2005
ABSTRACT: Organic affinity of toxic elements V, Cr, Mo, U in flotation-cleaned coal of Ganhe
Piaopiao Duan, Wenfeng Wang, Shuxun Sang, Yuegang Tang
The Society for Organic Petrology (TSOP)
... leaching, transmission electron microscopy plus energy dispersive spectroscopy, and Fourier transform infrared spectroscopy techniques, and the results...
2018
Depositional Rhythmicity in the Monterey Formation the Nature and Timing of Cyclic Patterns
Bonnie Bloeser
Special Publications of SEPM
... and Fourier analyses of the first-order cycles will hopefully yield insight into forcing by mechanisms other than autocyclic. Such investigations...
1990
Decarbonization of Seismic Survey Acquisitions
Mostafa Naghizadeh, Andrea Crook, Michelle Montano, Alyson Birce, Michael Hons, Stephanie Ross
Unconventional Resources Technology Conference (URTEC)
... geometry. The G2 (i.e., EcoSeis) geometry provides an optimal trace distribution for sparse Fourier reconstruction algorithms (also known as compressive...
2023
Development of offshore microtremor array exploration
Yoshikazu Matsubara, Mikihiro Imai, Akeshi Hiraide
International Meeting for Applied Geoscience and Energy (IMAGE)
... installation method was found to be appropriate. Figure 3 a) shows the fourier spectra obtained by 200 m array measurement. The spectra of all OBSS were...
2022
A practical implementation of data-space Hessian in the time-domain formulation of source extended full-waveform inversion
Gaoshan Guo, Stephane Operto, Ali Gholami, Hossein S. Aghamiry
International Meeting for Applied Geoscience and Energy (IMAGE)
.... In this method, each windowed trace is analyzed using the conventional Fourier transform to obtain a locally-stationary matching filter as ∗ b δ ds,r (ω, τ)δ...
2022
ABSTRACT: Study of Structure and Biomarkers of Organic-Clay Complexes in Immature Oil Source Rocks, Shengli Oil Field, China
Lu Xiancai, Hu Wenxuan, Zhou Guangjia, Mia Deyu, Chen Zhilin
The Society for Organic Petrology (TSOP)
... extraction(CE) and supercritical C 0 2 fluid extraction (SFE) to treat source rock samples, X-ray diffraction (XRD)and Fourier transform infrared...
1997
Application of Robust Noise Reduction on a Land 3D Seismic Data
Agus Abdullah, Jesse Shaw
Indonesian Petroleum Association
... of a spatial Fourier transform: (1) − Lxc ks r ∞ ~ GBj ( s, f ) = eikr ros ∫ ω + (ros − rd )... j −∞ λ λ r ... exp i 2π n − n d...
2012
Clay Typing, Mineralogy, Kerogen Content and Kerogen Characterization from DRIFTS Analysis of Cuttings or Core
Michael Herron, MaryEllen Loan, Alyssa Charsky, Susan L. Herron, Andrew E. Pomerantz, Marina Polyakov
Unconventional Resources Technology Conference (URTEC)
..., or storage of any part of this paper without the written consent of URTeC is prohibited. Abstract Diffuse reflectance infrared Fourier transform...
2014
Designing alternative 3D seismic surveys for reduced environmental footprints using the seismic trace density parameter
Mostafa Naghizadeh, Andrea Crook, Alyson Birce, Stephanie Ross
International Meeting for Applied Geoscience and Energy (IMAGE)
... densities of 6.0, 1.5, respectively. Double weave geometries provide optimal trace distributions for sparse Fourier reconstruction algorithms (also...
2023
ABSTRACT: Maturation and Organic Geochemistry of a Series of Modern to Eocene Resins from New Zealand and Australia
Paul C. Lyons, William H. Orem, Maria Mastalerz
The Society for Organic Petrology (TSOP)
... to Eocene and having ranks to high volatile C bituminous coal--were investigated using elemental, pyrolysis-gas chromatography (PY-GC), Fourier...
2005
ABSTRACT: Characterization of chemical functional groups in macerals across different coal ranks via micro-FTIR spectroscopy
Yanyan Chen, Maria Mastalerz, Arndt Schimmelmann
The Society for Organic Petrology (TSOP)
... Geological Survey, Indiana University, Bloomington, IN 47405-2208, USA *Correspondence: [email protected] 1 2 Fourier transform infrared spectra...
2012
Abstract: Sources and Distribution of Silt, South Texas Shelf
Jim Mazzullo , Jeffrey Crisp
GCAGS Transactions
...Abstract: Sources and Distribution of Silt, South Texas Shelf Jim Mazzullo , Jeffrey Crisp 1984 Vol. 34 (1984), Fourier grain shape...
1984
Spatial Analysis of Basement and Cover Linears by Optical Diffraction - Methods, Results, and Interpretation
Howard J. Pincus, Thomas W. Doe
Utah Geological Association
... Fourier amplitude transform of the input image. This transform is a graph of the distribution of orientations and spatial frequencies of the elements...
1974
Abstract: First Macromolecular Characterization of Fossil Choanoflagellates
Pjotr Meyvisch, Kenneth N. Mertens, Carolina Fonseca, João G. Mendonça Filho, Matías Reolid, Luís V. Duarte, Stephen Louwye
The Society for Organic Petrology (TSOP)
... choanoflagellates in sediments from the Cretaceous was made (Fonseca et al., 2023). Here, attenuated total reflection (ATR) micro-Fourier-transform...
2023
ABSTRACT: Evolution of the Chemical Structure of Hat Creek Resinite During Oxidation: A Combined FT-IR Photoacoustic, NMR and Optical Microscopic Study
T Gentzis, F. Goodarzi, R.A. McFarlane, A.M. Vassallo
The Society for Organic Petrology (TSOP)
... of Fourier transfonn infrared (Ff-IR) photoacoustic and carbon-l:3 nuclear magnetic resonance spectroscopies. The determined changes in molecular...
1991
Abstract: The Occurrence, Genesis and Characteristics of Primary Kaolinitic Clay Occurrence at Km 12-13, Bukit Lampas, Spg. Pulaipos Slim, Ipoh
Kamar Shah Ariffin, Haryati Abdul Rahman, Hashim Husin, Kahirul Anwar Abdul Hadi
Geological Society of Malaysia (GSM)
... diffraction (XRD), Differential Thermal Analysis (DTA), Thermo gravimetric analysis (TGA), Scanning Electron Microscope (SEM), Fourier Transform Infra...
2006
Potential of UV-Visible Absorption Spectroscopy for Characterizing Devonian Black Shales
Teivardashni Gunasergaran, Eswaran Padmanabhan, Ibad Mahmoodi, Yang Wang Chuan, Zaky Ahmad Riyadi
Geological Society of Malaysia (GSM)
..., S.M.I. and E. Padmanabhan, Hydrocarbon Bond reflectance (ATR) Fourier transform infrared spectroscopy Variation in Some Shales from Batu Gajah...
2017
Patterns of Quartz Sand Shape Variation, Long Island Littoral and Shelf
Debra D. Riester , R. Craig Shipp , Robert Ehrlich
Journal of Sedimentary Research (SEPM)
.... (December), Fourier analysis of quartz grain shapes across the shelf and adjacent beach-littoral system off Long Island reveals a pattern of variation...
1982